Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Boldr Polaris?

At MSRP the Boldr Polaris is the cheaper of the two at $399, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,369 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Boldr Polaris?

The Serica Ref. 5303 Diving Chronometer wears larger at 39mm versus 38mm for the Boldr Polaris — a 1mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Boldr Polaris?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 200m for the Boldr Polaris.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Boldr Polaris?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 40 hours on the Boldr Polaris.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Boldr Polaris?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Boldr Polaris uses the Seiko NH38A.

Side by side

Serica Ref. 5303 Diving ChronometervsBoldr Polaris

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Add a watch

Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

Boldr Polaris

polaris-blackout

MSRP $399

At a glance

11 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Polaris38mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Polaris40h

Water Resistance

Ref. 5303 Diving Chronometer300m

Polaris200m

MSRP

Ref. 5303 Diving Chronometer$1,768

Polaris$399

Full specifications

Case

6 specs

Crystal & Dial

1 specs

Dial Color

Enamel Black

Blackout

Movement

3 specs

Caliber

M100 COSC

Seiko NH38A

Power Reserve

42h

40h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$399

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Serica Ref. 5303 Diving ChronometervsBoldr Polaris

At a glance

Full specifications

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